/dev/hdb1 is apparently in use by the system; will not make a filesystem here!磁盘正在使用

今天帮客户挂载个服务器硬盘、一直挂载不上。无法格式化、后来看了下 正在使用、
停止下。
[root@localhost ~]# mkfs.ext3 /dev/hdb1
mke2fs 1.39 (29-May-2006)
/dev/hdb1 is apparently in use by the system; will not make a filesystem here!

[root@localhost ~]# mkfs.ext3 /dev/hdc1
mke2fs 1.39 (29-May-2006)
/dev/hdc1 is apparently in use by the system; will not make a filesystem here!

解决方法：
[root@localhost ~]# dmsetup status
pdc_c jehibeegp1:0 160086465 linear

pdc_c jehibeeg:0 320172800 striped 2 3:64 22:0 1 AA
[root@localhost ~]# dmsetup remove_all

[root@localhost ~]# dmsetup status

No devices found

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